Hair drug testing: Many street drugs (or their breakdown products in the body) are absorbed into the hair. A sample of hair can be tested for recent drug use. Hair analysis: Testing of hair for toxic exposures, such as lead or mercury poisoning.
Gas Water Heater, water not hot enough-Thermostat or Sediment. The dip tube probably disintigrated. The dip tub sends cold water to the bottom of the tank for heating when its heated it rises to the top of the tank. Its possible that the dip tube broke of and now you have cold water mixing with the hot water on top.
That's the sound of steam bubbles percolating up through the muck. On a gas water heater, the sediment creates hot spots that can damage the tank and cause premature failure. On an electric water heater, sediment buildup can cause the lower heating element to fail.So flushing offers a payback in lower energy bills and extended heater life.Use a kitchen colander to catch the sediment so it doesn't clog the floor drain.) Then open a hot water faucet on an upper floor and the water heater drain valve. Let the tank drain until sediment clogs the valve and reduces the flow. Then close the upstairs hot water faucet and water heater drain valve.